Fixed camera

src/display/camera.h

@@ -20,7 +20,8 @@ typedef enum {
 typedef enum {
   CAMERA_VIEW_TYPE_MATRIX,
   CAMERA_VIEW_TYPE_LOOKAT,
-  CAMERA_VIEW_TYPE_2D
+  CAMERA_VIEW_TYPE_2D,
+  CAMERA_VIEW_TYPE_LOOKAT_PIXEL_PERFECT
 } cameraviewtype_t;
 
 typedef struct {
@@ -36,6 +37,13 @@ typedef struct {
       float_t up[3];
     } lookat;
 
+    struct {
+      float_t offset[3];
+      float_t target[3];
+      float_t up[3];
+      float_t pixelsPerUnit;
+    } lookatPixelPerfect;
+
     struct {
       float_t position[2];
       float_t zoom;